In gross examination of a surgically removed testis, its size is enlarged. The cut-surface is grey-white, with different in form and size yellow and blood-red areas. In histological examination there are found nests and strands of clear, highly atypical cells with mitoses, which resemble spermatogonia , separated by fine strands of connective tissue. There are present necrotic are and hemorrhages. Set the pathomorphological diagnosis?
Select one of the following: